Method and apparatus for coating bands of fabric.



No. 815,664. :PATENTED MARQ20, N06;

D, D. WADKDL, i METHOD AND APPARATUS FOD DDATDDG BANDS DPFADAAD.

APPLIDATIDN FILED o'ffs, 1905,

' -Naeiaee-i.

siding 'at Nuremberg, Bavaria, have invented newfand useful Improvements UNITED STATES PATENT ornro .rarrz o. wioKnL, QFINREMBERG, GERMANY. METHOD AND APPARATUS'Politico/irme elemosina-brasato.

Specification of [iettersv Patent. I

Patentee Marsh 2o, iene;

Application lcd October 3, 1905. Serial No. 281.135.

To @ZZ whom 'it may] concern: i

Be it known that I, FRITZ C. WICKEL, director, a subject of the German Em eror, re-

ermany,

in Methods andl Apparatus for Coating Bands of Fabric',.of which the following is' a specifiscale of the well-known method of forming a metallic govt/der coatingon bands of paper or fabric y means of a layer of resin product hithertoresulted, as a rule, in which only vthe lowermost'layer of vthe metallic powder adhered firmly, while the upper vlayerof the metallic powder rested only loosely thereon and came off on contact. The complete re- 4 moval of this loose part by mechanical contrivances of any kind-such,- for instance, as brushing or wiping ap'paratus in such a way that the product shows a uniform surface condition has not hitherto been successfully done.

Now this invention for its object to allow ofthe manufacture on a large scale of paper or fabric bands havin a firmly-adherent and entirely uniformly istributed coating of metallic powder. It is based on the fundamental idea of removing as far as possi-v ,.ble the loosely-adherent part of the metallicpowder layer and' firmly combining the re- .mainder with the already rmly-adherent part, and thereby with thefoun'dation of pa er orfabric itself. This idea is practi- .c'a ly carried out b thesurplus metallic powder being remove by-'water with the4 assistance of rotary brush-cylinders, and then .the

greater part of the layer of water remaining on the washed surface further 4o taken up by' other rollers,

fabric fully dried by means of a heated roller,

` and also warmed until theV resin coating bind- .i so

ing the metallic powder is temporarily softened.

The invention will now'lbemore particu-v larly described with reference vto the accompanying drawings, in which-u Figure 1 is a diagram of a machine employed for carrying out 'this"fimpr oved of the same.

The paper band a, rovided with an unfinished coating of meta lic powder in the ordii merely by its mechanical the loosely-adherentexcess of metallic pow-Y after some and then the band ofpaper or.

moved in any suitable manner.

roller d, which is so arranged relative to the roller c that-thepart of the-.paper band lo-i cated between the two,v forms an inclined plane. The arrangement is such that `the metallic side ofthe paperband faces down- Fward at the art which reaches the roller c in i a" horizontal y-stretched condition, and in the inclined part of the paper band it-faces {up' fward. Somewhat above'the roller c a waterstrength is discharged' onto the surfaceof the paper. As the metallic powder applied to` the paper is as little soluble in Water, as ,the y powder, thewater" layer of resin binding the action Washes away der (not, indeed, completely, but lto a considerable extent) without'injuring in any Way the layer of metallic owder already adher-v ent to the paper lies under Ithe said loose layer or affecting its uniformity. The mechanical action of the jetof water. is as-- sisted by a brushing-rollerf, with a covering arranged in strips being provided somewhat belowthe p'lace where the water is `discharged on the roller c, which brusliing-rollerf -serves to remove, at the place 'where thewater acts, the metallic powder' loosely lying onthe aper band, whichisthen immediately was ed away by the water without.l being able to set fast or stick in thecoverino -of the' brushroller. ,By this-means ythe rawback which has arisen where brushing devices are vused aloineis avoided-namely, thatthe brushes become set full with .the metallic powder, again `appl the powder .taken `up to lthe paper ban ,.-andthus a permanently good period olf-use, when they have I action of the apparatus is insured. "The washingwater accumulates in' avessel g,- arranged under` the roller'c',`and is from here re'- .i

vAt the upper roller d a second .brushing-roller 7i is provided. Thishas-for-its object to remove the major part of any water carried up with ythe paper band. The paper band freed in this manner from water,'or,at vleast from the mamethod, and Fig. 2 is a plan view 'of a portionjv jor part of the water, pas'sesffromthe roller d over a hollow internally heated roller i of large diameter and is carried round this over 4 a considerably large periphery. In consequence of the roller being heated the mois' IIO \ coated fabric, which consists in app rollers, and a heating-roller in such mutuallI l der-coated fa considerably heated, (preferably to about 140.) By this means the particles of resin binding the metallic powder are softened without uite fusing and they combine with one anot er into a coherent coating-which extends to a considerable depth into-the band of paper or fabric, and consequently firmlyy cles, removing the surplus water, heating,

and allowing to cool.

2. The method of producing a owder'- coated fabric, which consists in app ying to the fabric the desired powder in a vehicleinsoluble in water, scrubbing the fabric to remove the loosely-adherent particles of powder, re movingthe surplus water, heating,.and allowing to cool.

3.' The lmethod ofA producing a owderlying to the fabric a coating of metallic owder in a resinous vehicle, wet-scrubbing t e fabric toA removethe loosely-adherent particles, removingthe surplus water, heating sufficiently 'to dry the fabric and soften the resin,- and allowing to cool.

4. In a machine for carrying out the method described the combination of a waterfeed nozzle a plurality of feed and brushine arrangement and succession that the band of paper or material in passing between a first guide-roller and its respective brushing-roller is freed by water fallin from above between them from any excess o metallic powder, and on passing between a second guide-roller and a second brushing-roller belonging thereto, freed from the maior part of the adherent water, and then by traveling overtlfev heating-roller the drying and heating of the paper or material band is completed substantially as described. n

5. In an aparatus for producing a powfiric, the combination, withrolls carrying the initially-coated fabric, of means for wet-scrubbing the coated surface of the fabric, means for removing-the surplus water' after scrubbing, and means for heating the fabric.

6. ln an a )paratus for producing a powder-coated fa ric, the combination, with rolls carrying the initially-coated fabric, of ascrubi hing-brush arranged closely adjacent to one of the carrying-rolls and bearing upon the coated surface of the fabric, means for supplying water to the fabric surface adjacent to the point of-v Contact with the scrubbing-brush, means for removing th'e surplus wat er from the fabric after leaving the scrubbing-brush,.and means for heating the fabric.

7. In ana )paratus for producing a powder-coated fa ric, the combination, with rolls carrying the initially-coated fabric,'of aA rotary scrubbing-brush arranged closel adjacent to one of. the carrying-rolls and bearing upon the coated surface of the fabric, awaterjetfor supplying .water to the fabric surface adjacent to the point of contact with the scrubbing-brush, rotary means for removing the surplus water from thefabric after leaving the scrubbing-brush, and means for heating the fabric.

8. In ana paratus for yproducing a p owder-coated faiiric, the combination,.with rolls carrying the initially-coated fabric, ofarotary scrubbing-brush arranged closely adjacent to one of the carr 'ing-rolls and bearing upon the coated sur ace of the fabric, a water-jet havin the faric and supplying water to the coated surface of thc fabric at the point of contact with the scrubbing-brush, a rotary brush for removing the surplus water from the fabric after leaving the scrubbing-brush, and a heated drum for heating the fabric.

9. In an a paratus for producing a -powder-coated fa ric, `the combination, with rolls carrying-the'initiall v-coated fabric, of a rotary scrubbing-brus 1 arraiiged closel adjacent to one of the carrying-rolls and )caring upon the coated surface of the fabric, a waterjet having a width substantially equal to that of the fabric for supplying water to the coated surface closely adjacent to the point of contact with the scrubbing-brush, a second rotary brush arrangedclosely adjacent to another of the carrying-rolls and bearing upon the wet surface of the fabric to remove the surplus water therefrom, and an internallyheated drum arranged to receive the fabric. and heat the same.

In testimony whereof I havey signed my nume to'this specification in the presence of two subscribing witnesses.

Witnesses:

WILHELM HNN, OsoAR BooK.

a width substantially equal to that of' IOO IOS

IKO 

